Method of coating strip material



Nov. 23, y1943.

J. ETTL METHODOF coATING sTRIB MATERIAL 2 Sheets-Sheet l Original FQled April 30 i INVENTOR asEP/-l ETTL.

f Nav. 23, 1943. J. Em. 2,335,173.

METHOD OF COATING STRIP MATERIAL Original Filed Apri1`50, 1957 2 Sheets-Sheet 2 J- INVENTOR seP/-l [TTL strips heated until the same pass out of t Patented Nov. 23, 1943 METHOD OF COATING STRIP MATERIAL Joseph Ettl, Highlands, N. J., assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation of New York Original application Ap 139,907. Divided ril 30, 1937, Serial No. and this application Septem- 1 ber 19, 1942, Serial N0. 458,953

6 Claims. (Cl. 117-103) This inventiornelates to the method of handling strip mater d and is particularly directed to the application coating material, such as adhesive, glue, varni h and the like, to the face of paper strips or other material as the same are `fed through a machine. f

More specifically, the invention relates to a method wherein the material being applied-to the strips is heated and the strips to which the material is applied are likewise heated during the application of' the coating material to the strips.

This application is a division of my co-pending application, Serial No. 139,907, filed April 30, 1937.

One of the objects of thepesent invention is the provision\cf a methodwherein heated iluid, such as bil, for example, is eated by electric means and is circulated in .y uch a manner 'as properly to heat the strips as ille same are passed through a machine toset th icoating material which has been applieg Another object of the prg@ in the provision of a method of`app1y g coating material to paper, for example, wliere the heat employed is'from a source external tb t e rollers of the press or machine.

A still further object of the inventioiiresides in the provision of a method for maintain A g the machine to a chilling device where the coating material is finally set. W

`Other objects of the present invention manifest from the following description'andfthe accompanying drawings, wherein I have illustrated. an apparatus for carrying out my iniproved method.

Inthe drawings:

Fig. 1 is a side elevation of the apparatus;

Fig. 2 is aplan view of the same with the upperV cylinder and other parts removed for clarity of illustration;

Fig. 3 is a plan view of the machine; and Y Fig. 4 is a sectional view of the heated blanket roller or plate cylinder.

Referring to the drawings in detail: 2 designates a frame or support for the device having a. pulley 4 mounted on a shaft `6 and driven from a suitable source (not'shown) through a belt 8. `The shaft -6 carries a pinionI I6 meshing'with V I another pinion I2 which 'in turn is in mesh with a 'gear I4 on a shaft I6 carrying Aupper feed or backing roller orcylinder I8.

The gear I4 meshes with a gear 20 molunted on'shaft 22 carrying a lower plate cylinder or will tel blanket roller 24. This roller is provided with a removable blanket 26, secured at one `end to the roller by a clamp 28 which is pivoted at 30 and latched in clamping position by means of latch re ieizietion resides f cover or `door 12 similar to the door 62 of the 32. The other end ofv the blanketis wound on a rod 34 having a. pawl and ratchet arrangement '36 associated therewith for the purpose of tightening the blanket about the roller.

The blanket 26 receives coating material from l a coating-applying or .form' roller 38 mounted on a shaft 40 which is driven by means of a sprocket chain 42 from the shaft 6. The form roller 38 receives the coating vmaterial from a fountain roller 44 which dips into a tank 46 .formed in vthe concaved cover of an enclosed heated oil tank 48 which will ently.

A table 50 is provided for feeding the strips of material tc the machine. This table is supported at one end by the frame 2 of the machine and at its other end by a support 52. As the strips are fed from the table between the backing cylinder or roller I8 and the plate cylinder or roller 24 the blanket 26 contacts the lower face of the strips and applies the coating 'material thereto; As the strips pass between the rollers the for- Ward end thereof isgripped by a gripper 54 carried by the backing roller I8 inthe usual manner and conveyed .about the roller I8 and deposited be described preson a conveyor belt 56, which conveys the same out of the machine.

The plate cylinderl 24 is enclosed in a cylindrical housing 6I), provided with a cover or door any suitable source of power through conductors 68. The cylindrical housing'60 also.encloses a series of heating coils 10 through which heated oil or other fluid is circulated. The electric heating elements A66 and the heating coils 10, it will be appreciated, will maintain the blanket 26 in heated condition during the rotation of the roller. l

'Ihe backing roller I8 is provided with a hinged plate cylinder 24 whereby inspection may readily be made. i

When oil is used as the heating medium it is heated in the closed tank 48 by means of an immersed electric heating element I6 which receives its energy from any, suitable source through the conductors '15.v A thermostatic -switch may be provided in housing 'I'I for regulating or controlling the heat of the fluid in the tank 48.

A fluid conduit; 'I8 leads from the bottom of the tank 48 to the intake side of a. pump B0 driven by a nelectric motor 02. When the pump `80 is not in loperation the fluid obviously will be retained in the-tank 48 and the conduitl.

Connected` to' the outlet side of the pump 80 isa conduit 84 provided. with several branch lines.

- One-of these lines leads to a drain 86 which when the valve 88 thereof is open will allow the tank 48 and all of the conduits hereinafter described n,

to be drained of oil by driving the pump lili. Another branch line 90 leads to one end of the hollow shaft 40 of the form roller 38, the .heating fluid passing out of this shaft at vthe other end through a' coiled conduit 92 connected to one end` of hollow l 5 shaft 9.4 of the roller 44, thence through theconduit 96 back to the tank 48. Another branch line leads from the pump 80 to the conduit |00, one `branch |02 of which leads through the heating coils-10 in th'e blanket roller housing, thence 2n through conduit |04 into the. return line |06 and back to the tank 48. The other branch of the "conduit |00jleads to the hollow shaft 22 of the .cylinder24 and as shown in Fig. 4 communicates with four branches |01, each leading to one of-Yz four lchambers |08 in ,the plate cylinder. The

.. fluid passing linto these chambers serves to heat the plate cylinder from the interior and passes out of the chambers through branches |09 to re turn line |06- back to the tank 40. The tank 48 may be drained at ||0 when the pump 80 is not 'in operation. The tank 48 is supplied with oil or other lfluid from the ller tank ||2 which has a conduitl |,|3 in its lower end in communication with the'retrn line |06 leading to the tank 48. 35

The filler tank is also provided with an overflow -line |V|4 communicating directly with the tank 48.

When the strips of material pass between the rollers or cylinders I8` and 24 and are deposited I on the conveyor belt 56 they are subjected to fur- 40 ther vheat treatment.

For this purpose f1 provide. a heater ||6 which is mounted on rails |l|8 directly above. the conveyor beltl 56. This heater receives its -current through conductors 11%5 and l may be controlledoy thermostat |11.

and hinged't'o the machine frame, the other end of thebracket4 |24 Vbeing supported on an adjustable bracket |26 whereby the chilling unit maybe 55 moved toward and away from the conveyor belt From the foregoing it will be appreciated that when the oil inthe tank 48, is heated by means of the heating element 16 the heat will be trans- 60 ferred to the concaved cover containing the coating material whereby the same will be maintained' in'a heated condition. The oil, as will be appreciated, is pumped from ythe tank through the various conduits described for the purpose of 65 heating the blanket and the various rollers mentioned when the machine is in operation.. The heating elements 66 in the cover of the blanket roller are electric heating elements.

pipes in the cover as a more convenient form. It

vwill be appreciated, however, that the heating 'elements 66 will provide a continuity of heating surface forthe blanket during its rotation.

It will also be appreciated that when the oil 75 |22 desigy50 I prefer this arrangement rather than employing the heating 7 is drained from the conduits as hereinbefore de-n scribed the sole heating means for the fountain, rollers and cylinders' will be the heating means for the fountain to` maintain uidity of its contents and the external radiant heating means for the cylinders.

The method of the present invention as will readily be understood from the foregoing comprises the steps of heating the coating material in the tank 46 to a predetermined temperature, transferring the heated coating material to the form roller 44 thence to the plate cylinder 24 where it is applied to the strips of material vfed between the rollers |8,and 24. The coated sheets are then deposited in the conveyor |20 and chilled by the chilling unit |212.

When the oil is circulated through the conduits as hereinbefore described the rollers and cylinders are heated4 internally in addition to the extreme heating hereinbefore. described.

It is to be understood that while I have described a preferred apparatus for carrying out my improved method and a preferred order of performing the steps of the method I do not wish to be limited thereto ,as obviously variations may be made therein without departing from the spirit and scope of my invention,

What I claim is:

1. The method of applying coating material to paper comprising the following steps: heating the coating material to a predetermined temperature,

A transferring the hot coating material to a printing mechanism, applying radiant heat from an external source to the said printing mechanism, the heat which originally melts the coating material and said radiant heat constituting the sole heat-used in the process.

2. The method of applying coating material to paper comprising the. following steps: heating,

the coating material to a predetermined temperature, transferring the hot coating material to a printing cylinder, applying radiant heat from an external source to said printing cylinder, the heat which originally melts the coating material and 5 said radiant heat constituting the sole heat used in the process.

3. The method of applying coating material to paper comprising the following steps: heating the coating material to a predetermined temperature, transferring the hot coating material to a print- .ing mechanism, applying radiant heat from an external source to the said printing mechanism, theheatV which originally melts the coating material and said radiant heat constituting the soler heat .used in the process, the said radiant Lheat applied from an external source heating at least a portion of the exteriorof the. printing cylinder.

. y4. -The method of applying coatingrmaterial to paper comprising the following steps; heating the coating material to aA predetermined temperature,

. transferring the hot coating material to a printing cylinder, applying radiant heat from an eX- ternal source to the said printing cylinder, the heat whichv originally melts the coating material and saidfradiant heat constituting the sole heat used in the process, the said radiant heatapplied from an external source heating at least a portion of the exterior ofthe printing cylinder.

5. The method of applying coating material to `strips of material comprising the following steps: heating the coating material to a predetermined temperature, transferring the hot coatingmaterial to the exterior of an internally heated cylinder while rotating the cylinder, and moving a strip of material to be coated in contact with the periphery of said cylinder while applying radiant heat from an external source to said strip of material.

6. 'I'he method of applying coating material to strips of material comprising the following steps: heating the coating material-to a predetermined temperature, transferring the hot coating material to the exterior of an internally heated cylinder while rotating the cylinder, moving a strip of material to be coated into contact with the periphery of said cylinder while applying radiant heat to said strip of material from a source external to said cylinder and nally chilling the said strip whereby to set the coating material.

JOSEPH ETI'L.` 

